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audio/internal/convert: Use int64 (now it is fast enough on browsers?)

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This commit is contained in:
Hajime Hoshi 2018-01-05 20:03:17 +09:00
parent c020101afc
commit 005d18ceff
1 changed files with 2 additions and 4 deletions
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6
audio/internal/convert/resampling.go
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@ -97,11 +97,9 @@ func (r *Resampling) Size() int64 {
return s / 4 * 4 return s / 4 * 4
} }
func (r *Resampling) src(i int) (float64, float64, error) { func (r *Resampling) src(i int64) (float64, float64, error) {
const resamplingBufferSize = 65536 const resamplingBufferSize = 65536
// Use int here since int64 is very slow on browsers.
// TODO: Resampling is too heavy on browsers. How about using OfflineAudioContext?
if i < 0 { if i < 0 {
return 0, 0, nil return 0, 0, nil
} }
@ -181,7 +179,7 @@ func (r *Resampling) at(t int64) (float64, float64, error) {
lv := 0.0 lv := 0.0
rv := 0.0 rv := 0.0
for n := startN; n <= endN; n++ { for n := startN; n <= endN; n++ {
srcL, srcR, err := r.src(int(n)) srcL, srcR, err := r.src(n)
if err != nil { if err != nil {
return 0, 0, err return 0, 0, err
} }